The following code indicates how to write the Message object and how to use it in your code:

//Message.java
package org.hr.communication;
import net.jini.core.entry.*;
public class Message implements Entry {
  public String details;
  public Message() {
  }
  public Message(String details) {
    this.details = details;
  }
  public String toString() {
    return "MessageContent: " + details;
  }
}

In the following code, the client makes use of the Message object to store data in the space and then retrieve it as and when required:

package org.hr.communication;
import net.jini.space.JavaSpace;
public class SpaceUser {
  public static void main(String args[]) {
     try {
       Message message = new Message();
       message.content = "Hi ";
       //Searching for Java Space
       Lookup searcher = new Lookup(JavaSpace.class);
       JavaSpace jSpace = (JavaSpace) searcher.getService();
       //A Java Space is found
       //Writing a message to space
       jSpace.write(message, null, 60 * 60 * 500);
       Message tmpl = new Message();
       //Reading a message from the space
       Message rslt = (Message) jSpace.read(tmpl, null, 
       Long.MAX_VALUE);
       //Print the message content
       System.out.println("The message read is: " + rslt.content);
     } catch (Exception e) {
       e.printStackTrace();
     }
   }
}